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Re: [O] org-src--contents-for-write-back : preserve original major-mode,
From: |
Nicolas Goaziou |
Subject: |
Re: [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers |
Date: |
Sat, 22 Apr 2017 10:41:33 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) |
Hello,
Brent Goodrick <address@hidden> writes:
> I found a bug in org-mode where emacs-lisp code that is in a
> already-indented source block in an org-mode buffer is improperly
> indented when editing it via C-c '. Take the following contrived
> example emacs-lisp source code:
>
> 1. Here is a list item with a emacs-lisp source block:
>
> #+BEGIN_SRC emacs-lisp :results value
> (let ((uuid "c2327c73-6da3-4421-8bda-194783a00e8f"))
> (progn
> (let ((xxx 'yyy))
> (let ((xxx 'yyy))
> (while t
> (message "infinite loop"))))))
> #+END_SRC
>
>
> After C-c ', indenting it, and C-c ' again, it renders as
> follows (tabs converted to spaces for this email, since I have
> `indent-tabs-mode' set to t in my emacs-lisp mode, which
> is the Emacs default):
>
> 1. Here is a list item with a emacs-lisp source block:
>
> #+BEGIN_SRC emacs-lisp :results value
> (let ((uuid "c2327c73-6da3-4421-8bda-194783a00e8f"))
> (progn
> (let ((xxx 'yyy))
> (let ((xxx 'yyy))
> (while t
> (message "infinite loop"))))))
> #+END_SRC
>
> Notice how the indentation looks bad due to the mixture of tabs
> and spaces.
Indeed. Thank you.
> The bug is in the `org-src--contents-for-write-back' function. It
> uses a temp buffer. The temp buffer's major-mode is left to be
> the default, which is fundamental-mode, which knows nothing about
> how to indent lisp code properly.
And it doesn't need to. This function doesn't care about the code, but
indents it rigidly according to original source block. IOW, I don't
think changing the major mode is required.
> So in the fix below, I run the major-mode function from the original
> buffer. But even with that fix, the indentation must also use spaces
> in order to avoid mixing tabs and spaces in the resulting Org buffer.
Why do you think it is a good thing that tabs and spaces shouldn't be
mixed. For example, imagine that the source code requires
`indent-tabs-mode' being non-nil, but Org source buffer indentation is
space only, i.e., with `indent-tabs-mode' being nil.
Shouldn't the resulting block be indented with spaces from column 0 to
block boundaries' indentation, and then follow with space indentation?
WDYT?
Regards,
--
Nicolas Goaziou
- [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers, Brent Goodrick, 2017/04/20
- Re: [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers,
Nicolas Goaziou <=
- Re: [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers, Brent Goodrick, 2017/04/22
- Re: [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers, Nicolas Goaziou, 2017/04/27
- Re: [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers, Brent Goodrick, 2017/04/28
- Re: [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers, Nicolas Goaziou, 2017/04/29
- Re: [O] org-src--contents-for-write-back : preserve original major-mode, and avoid mixing tabs and spaces in org-mode buffers, Brent Goodrick, 2017/04/29